Justlisten: Whatever sounds best. I preferred a jumper made of Kimber Kable and single wiring to biwiring on my old setup. In this case the stock jumper bars were the worst sound of the three. My new speakers only allow single wiring which frees up some time for me to be confused and perplexed about other aspects of the system.
Am I Nuts or What?
This goes against everything I thought to be true, but I compared sound quality of my Acoustic Energy ae2s with the stock wire jumper vs a pair of high quality Transparent and Apex jumpers and found the ol stock wire connector to be superior when using my non bi wired Yamamura m4000 or S/W Maestro speaker cables. This just seems to go against the grain of what should be a better setup, considering the cost of the Tranparent and Apex jumpers.